<p class="MsoNormal" style="text-align: left; margin: 0cm 0cm 0pt;" align="left"><span class="text"><span style="font-family: ";Arial";,";sans-serif";; font-size: 9pt;">In this paper, we are studying the Prime Codes (PC) efficiency, in direct Sequence Optical Code Division Multiple Access system (DS-OCDMA) using Parallel Interference Cancellation receiver (PIC). We develop the analytical expression of the error probability upper bound in the chip synchronous case, for PC. The main result of our work is that the PIC receiver totally suppresses the effect of Multiple Access Interference (MAI) for Prime Codes, and leads to an error free O-CDMA link in the noiseless case, for whichever employed PC. Simulation results are presented to validate the theoretical analysis. We also show that the PIC receiver permits reducing the required code length for a given Bit Error Rate compared to the Conventional Correlation Receiver. Finally, we compare the PC to the Optical Orthogonal Codes (OOC), and show that the use of PC allows a significant reduction of the required SNR.</span></span><span style="font-family: ";Arial";,";sans-serif";; font-size: 9pt;"></span></p>
The incoherent Optical Code Division Multiple Access (OCDMA) is studied as a potential access technique for multimedia applications. In this paper, we propose to provide service differentiation with 2D codes based on Optical Orthogonal Code (OOC) namely: Multi-Wavelength Optical Orthogonal Code (MWOOC). The Quality of Service (QoS) differentiation is realized by partitioning a 2D code set into matrices with different weights. We develop the theoretical error probability expression of such system with a Conventional Correlation Receiver (CCR), and evaluate the performance in the case of three services differentiation.
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